# Degree

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**Degree of a continuous mapping**— This article is about the term degree as used in algebraic topology. For other uses, see degree (mathematics). A degree two map of a sphere onto itself. In topology, the degree is a numerical invariant that describes a continuous mapping between… …82

**Degree symbol**— This article describes the typographical or mathematical symbol. For other meanings, see Degree. ° Degree symbol Punctuation …83

**Degree (angle)**— One degree (shown in red) and ninety degrees (shown in blue) This article describes the unit of angle. For other meanings and some specific usages, see degree. A degree (in full, a degree of arc, arc degree, or arcdegree), usually denoted by °… …84

**Degree of a field extension**— In mathematics, more specifically field theory, the degree of a field extension is a rough measure of the size of the extension. The concept plays an important role in many parts of mathematics, including algebra and number theory indeed in any… …85

**Degree distribution**— In/out degree distribution for Wikipedia s hyperlink graph (logarithmic scales) In the study of graphs and networks, the degree of a node in a network is the number of connections it has to other nodes and the degree distribution is the… …86

**Degree Confluence Project**— A GPS unit at confluence 53N 0, in Lincolnshire, England The Degree Confluence Project is a World Wide Web based all volunteer project which aims to have people visit each of the integer degree intersections of latitude and longitude on Earth,… …87

**Degree-constrained spanning tree**— In graph theory, a degree constrained spanning tree is a spanning tree where the maximum vertex degree is limited to a certain constant k. The degree constrained spanning tree problem is to determine whether a particular graph has such a spanning …88

**Degree day**— A degree day is a measure of heating or cooling. Totalized degree days from an appropriate starting date are used to plan the planting of crops and management of pests and pest control timing. Weekly or monthly degree day figures may also be used …89

**Degree of comparison**— Grammatical categories Animacy Aspect Case Clusivity Definiteness Degree of comparison Evidentiality …90

**Degree of unsaturation**— The degree of unsaturation (also known as the index of hydrogen deficiency (IHD) or rings plus double bonds[1]) formula is used in organic chemistry to help draw chemical structures. The formula lets the user determine how many rings, double… …